MARYLAND FLOW REPORT
Last Updated: December 29, 2025
Maryland's rivers and streams are experiencing a notable downturn in streamflow, presenting concerns for recreational activities and water resource management. Many of the state's major waterways are flowing at significantly reduced rates compared to their normal averages for this time of the year. Significant rivers like the Susquehanna, known for the Conowingo Dam, are currently running at a mere 10.68% of their normal flow with a streamflow of 6660 cubic feet per second (cfs) and a gage height of 9.67 feet. Similarly, the Potomac River, a vital source for regional water supply and recreation, including popular whitewater trails near Point of Rocks and Paw Paw, has diminished flows around 20-25% of typical levels, potentially affecting cities such as Washington, D.C., and Hancock. The Patuxent River near Bowie, which is also an essential stream, flows at a mere 22.02% of its normal rate, with a reported streamflow of 130 cfs. This pattern of reduced flows is echoed across various monitoring points, indicating a widespread trend that river enthusiasts and local authorities should monitor closely.
The declining streamflow presents risks of flow droughts and could impact water quality and ecosystem health. It may also limit recreational activities like fishing, boating, and whitewater rafting. Despite these trends, some rivers have experienced slight increases in streamflow over the past 24 hours, such as the Potomac River at Paw Paw with an 11.56% increase, though these do not significantly alleviate the overall low-flow conditions. Enthusiasts and residents along these waterways should stay informed about potential water restrictions and altered conditions for aquatic activities. Given the data, it is crucial for local communities and water resource managers to take adaptive measures, considering not only the current low-flow conditions but also the possibility of sudden increases that could lead to localized flooding if weather patterns change abruptly.
Maryland's flow conditions are heavily influenced by its location along the Atlantic coast and the Chesapeake Bay, as well as its varied topography. The state experiences a humid subtropical climate, with hot and humid summers and mild winters. Major surface flows include the Potomac and Patuxent Rivers, which feed into the Chesapeake Bay. Reservoirs and dams such as the Conowingo Dam and Loch Raven Reservoir also contribute to the state's hydrology. The state's watershed includes the Chesapeake Bay watershed, which covers 64,000 square miles and includes six states and the District of Columbia. Snowpack in the Appalachian Mountains can also impact flow conditions in the state. Overall, Maryland's flow conditions are complex and influenced by a variety of factors.
Winter Storm Warnings
December 29 2025
Residents of Maryland, particularly those in Dorchester, Inland Worcester, Somerset, and Wicomico Counties, as well as in Eastern and Western Garrett Counties, must brace for severe weather conditions. A Wind Advisory is in effect with west winds of 20 to 30 mph and gusts reaching up to 45 mph, which could result in downed tree limbs and power outages. Concurrently, a Winter Weather Advisory warns of 2 to 5 inches of snow, with localized amounts up to 6 inches and wind gusts of 55 to 65 mph in higher elevations, leading to slippery roads and near-blizzard visibility. Furthermore, a High Wind Warning indicates even more extreme west winds of 25 to 40 mph and gusts up to 65 mph that may cause extensive tree damage and power disruptions. These hazardous conditions are predicted to affect travel and could last until late Tuesday, impacting those commuting or traveling in the region. Please take necessary precautions, stay indoors if possible, and keep abreast of the latest weather updates.